Django ModelForm calls default on fields even when not selected.

Hello,

I recently stumbled upon a problem with Django ModelForms which is that the default value gets called on fields not even selected by the form.

Here is an exampel:

// models.py

from django.db import models

def create_a():
    return ModelA.objects.create(name='<default-name>').id

class ModelA(models.Model):
    name = models.CharField(max_length=123)

class ModelB(models.Model):
    reference = models.ForeignKey(ModelA, default=create_a)

// views.py

from django.http.response import HttpResponse
from django.forms import ModelForm
from abc123.models import ModelA, ModelB


class MyForm(ModelForm):

    class Meta:
        model = ModelB
        fields = []

def my_view(request):
    MyForm()
    return HttpResponse('abc123')

// <end of code>

Now every time I call the MyForm init function (loads the my_view) the create_a functions gets called and there for a new instance if ModelA gets created even though I set fields to an empty list in the MyForms Meta class.

I can't believe this is intended or maybe I'm missing something answers would be apprecitated, Thanks.

// Jesper Jansson

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